If you are at all into weird instruments, particularly weird and/or old and/or historical analogue electronic instruments, you have to go listen to the post-restoration samples towards the bottom of the (very long, very large) page. It's mostly a true restoration; he added an XLR output jack (which he used for recording the samples) and changed the spring-based keyboard connector system to something less crazy, but the sound-generation elements are all per 1938/1940 factory spec.
Go play those post-restoration samples and just imagine that noise coming out of what looks pretty much like a spinet piano in 1938. Brain. splody.